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你的答案多了一个先决条件，现在没人告诉你坏的球是轻还是重。所以是错的。
lover4u
(吃着肥肥的爱情)
(#238616@0)
Last Updated: 2001-10-26
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不是微软试题，13个球，有一个球和其他的重量不一样，外观一样。用一个天平称三次，把那个球找出来。你能做到吗？嘿嘿。。。
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